US4913324A - Rotary valve for a metallurgical vessel and rotor and stator therefor - Google Patents

Rotary valve for a metallurgical vessel and rotor and stator therefor Download PDF

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Publication number
US4913324A
US4913324A US07/227,880 US22788088A US4913324A US 4913324 A US4913324 A US 4913324A US 22788088 A US22788088 A US 22788088A US 4913324 A US4913324 A US 4913324A
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United States
Prior art keywords
rotor
stator
valve
vessel
refractory
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Expired - Fee Related
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US07/227,880
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English (en)
Inventor
Ernst Luhrsen
Ullrich Hintzen
Raimund Bruckner
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Didier Werke AG
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Didier Werke AG
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Publication date
Priority claimed from DE19873725637 external-priority patent/DE3725637A1/de
Priority claimed from DE19883805070 external-priority patent/DE3805070A1/de
Priority claimed from DE19883819784 external-priority patent/DE3819784A1/de
Application filed by Didier Werke AG filed Critical Didier Werke AG
Assigned to DIDIER-WERKE AG reassignment DIDIER-WERKE AG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BRUCKNER, RAIMUND, HINTZEN, ULLRICH, LUHRSEN, ERNST
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures

Definitions

  • the present invention relates to a rotary valve for controlling the discharge of molten metal in a substantially downward or vertical direction from a metallurgical vessel, the rotary valve including a refractory rotor to be rotatable about a substantially horizontal axis within a refractory stator having a discharge channel, wherein the rotor has a flow channel to be moved into and out of alignment with the discharge channel upon the rotation of the rotor about the axis.
  • the present invention also relates to a refractory rotor and to a refractory stator employable in such rotary valve.
  • a rotary valve disclosed in FIG. 1 of DE-PS 33 42 836 is partially installed in a cavity of the refractory lining of the bottom of a metallurgical vessel.
  • the cavity is lined with a refractory housing formed by refractory shaped bricks and a cored panel into which the rotary valve is inserted and partially grouted therein.
  • the refractory housing also must be repaired, and this is a difficult task.
  • the housing forms on the one hand a thermal insulating shield to the molten metal, and the rotary valve is subjected to air cooling, thereby providing a substantial risk of the rotary valve freezing. Such risk of freezing is even greater with the rotary valve shown in FIG. 3 of such reference, since the function of this rotary valve is to close a pipeline. Additionally, the rotor is not replaceable without replacing the stator.
  • a rotary valve disclosed in DE-PS 33 06 670, tapping is achieved horizontally so that the rotor has to be designed as a relatively long valve member having a through bore with a discharge port and projecting sideways horizontally out of a vessel bottom.
  • the valve member is made of a refractory material and has therethrough an axial bore, it is not possible to transfer to the rotor sufficient torque, when the rotor is tightly seated against a stator, to rotate the rotor, when the rotor and stator are subjected to thermal expansion.
  • the rotor has relatively thin walls as a result of which the rotor is susceptible to wearing out rapidly.
  • a rotary slide valve including a perforated brick, an entry nozzle, a closing plate and a refractory discharge pipe with the plate-like flange. These elements also are arranged relatively far from the molten metal, thereby additionally increasing the risk of freezing.
  • a problem involved with the rotary valve disclosed in DE-OS 26 08 472 is that conical surfaces of a rotor and stator must have a high precision of fit to allow easy rotation of the rotor within the stator and to ensure a good seal therebetween. Also, the rotor suffers from tensile loading. Additionally, the rotor cannot be replaced through the vessel bottom or the vessel side wall without the stator. In operation, the rotor normally is subjected to higher wear than the stator so that it must be replaced more often than the stator. The geometry of the stator and rotor also require that the rotary valve is arranged and thus actuated in the immediate vicinity of the pouring stream, that is a region of very high temperatures. The entry port of the flow channel through the rotor is configured in a face thereof that is spherical. This results in the rotor wearing out very rapidly, particularly in a corner region in the immediate vicinity of the flow channel.
  • AT-PS 357 283 Disclosed in AT-PS 357 283 is a rotary valve arranged in a vessel bottom, particularly in a manner such that the rotor cannot be replaced through the vessel bottom without also replacing the stator.
  • the rotor suffers from tensile loading and can be actuated only from the bottom of the vessel.
  • a rotary valve disclosed in AT-PS 165 292 is located primarily outside a cavity of a vessel, particularly below the vessel bottom. Therefore, the risk of freezing is relatively high, and the actuating assembly for the valve is located relatively near the pouring stream. Due to the construction involved, the rotor can be replaced only with the stator and can be actuated only from below since the axis of rotation is vertical.
  • An outlet valve disclosed in GB-PS 2 174 029 includes a stator mounted in the lining of the base of a vessel, with an upper portion of the valve projecting through the entire molten metal bath in the vessel to a supporting arm above the vessel. This requires a substantial cost of construction. Additionally, the rotor and stator must be closely complementary. Furthermore, the contact pressure must be actuated via the bearing arm. Still further, only faces of the rotor and stator make contact, and this can result in both guiding and sealing problems.
  • a rotary valve disclosed in GB-PS 1 177 262 is not positioned in or on the lining of a wall of the vessel, but rather is actuated from below the vessel bottom.
  • the rotor has a flow channel configured in a relatively complicated shape and thus is subject to rapid deterioration. Also, the rotor cannot be replaced through the vessel bottom without the stator, but rather both the rotor and stator are replaced from the interior of the vessel.
  • U.S. Pat. No. 3,651,998 Disclosed in U.S. Pat. No. 3,651,998 is a rotary valve primarily in the form of two cylindrical mating pipes with a vertical axis and that extend through a vessel bottom.
  • the pipes have a special sealing arrangement. Actuation is in the immediately vicinity of the pouring stream.
  • the pipes have relatively thin walls and therefore are subject to rapid wear.
  • a feed control element for controlling the filling level of a continuous casting plant is disclosed in DE-PS 35 40 202.
  • At least two movable, concentrically arranged, vertically extending pipes pass into a supply vessel and have break-throughs for the passage of the melt to prevent occlusion of a discharge port of a melt storage container.
  • the break-throughs can be brought more or less into alignment by adjusting at least one pipe from above.
  • the other pipe can be axially adjusted and rotated with respect to the one pipe.
  • the actuation arrangement is relatively complicated and must be operated from above the metal melt. The replacement of parts is difficult, and this is a particular drawback since the parts are subject to rapid wear.
  • a device for controlling the flow rate from a tundish for continuous pouring is disclosed in Japanese application 61 182 857, the device having, for the purposes of reducing oxidation of a steel melt and improving the quality of the steel, a stator permanently mounted in a vessel bottom, and a vertical discharge channel into which lateral discharge ports open at small intervals above the vessel bottom.
  • the discharge rate is conducted with the aid of a vertical ram that is guided in the discharge channel of the stator and that is actuated for vertical adjustment from above the metal melt.
  • a tubular valve member similar to that disclosed in DE-PS 35 40 202, also can be used. This valve device requires actuation from above the metal melt.
  • the parts subject to wear i.e. the rotor and stator, can be replaced only from above the vessel.
  • a device for controlling the discharge of molten metal from a vessel disclosed in CH-PS 571 374 includes a valve member actuated from below a vessel bottom and guided adjustably vertically in a stator of the vessel bottom.
  • the valve member has a vertical flow channel which divides into two cross bores toward the top. In an open position, entry ports of such cross bores are above the surface of the vessel bottom within the metal melt. When the valve member is in a closed position, the entry ports are within a rotor. Actuation is achieved from below the vessel bottom, and thus in the immediate vicinity of the pouring stream.
  • a stator and rotor are arranged substantially below the vessel bottom, so that there is a significant risk of freezing of the metal melt. Furthermore, the rotor has an axis of rotation that is perpendicular to a vertical discharge channel of the stator and a flow channel extending perpendicular to such axis of rotation. Thus, the rotor must be actuated in the immediate vicinity of the pouring stream below the vessel bottom.
  • a rotary valve including a refractory rotor rotatable about a substantially horizontal axis, the rotor having an outer peripheral surface arranged symmetrically about the axis, and the rotor having therethrough a flow channel having inlet and outlet ports, at least the outlet port opening onto the outer surface, a refractory stator having therein a recess defined by an inner surface complementary to the outer surface of the rotor, the stator having therethrough a discharge channel intersecting the recess, and the rotor being at least partially fitted within the recess with the inner and outer surfaces of the rotor and stator, respectively, being complementarily positioned symmetrically about the horizontal axis, such that rotation of the rotor about the axis relative to the stator selectively brings the flow channel of the rotor into and out of alignment with the discharge channel of the stator.
  • the valve is positioned in or on at least one of the refractory
  • the molten metal is guided during discharge only for a very short distance in a substantially vertically downward direction from the interior of the vessel.
  • the rotor itself can be relatively compact so that its flow channel is correspondingly short. Since the functional parts of the rotary valve that guide the molten metal during discharge from the interior of the vessel are arranged entirely within the interior of the vessel or closely adjacent thereto and within the molten metal or in close contact therewith, such functional parts are maintained at a sufficiently high temperature by the molten metal so that the risk of freezing is reduced. Furthermore, the discharged metal is not contacted by environmental air.
  • the refractory lining of the vessel can be replaced in sections by the functional parts of the rotary valve itself, construction costs are reduced compared with known metallurgical vessels having rotary valves. Since the stator and rotor are arranged in and/or on the refractory lining of a vessel side wall and, if desired, the refractory lining of the vessel bottom, the rotary valve can be actuated from the side so that vertical downward pouring is not impeded. For the same reason, the required supply and consumption of energy in order to actuate the rotor is relatively small so that the operating components of the rotor drive can be designed to be of correspondingly low power and compact size. This promotes an efficient and reliable operation of the rotary valve. Furthermore, this makes possible a particular arrangement of the drive components that makes it possible to readily replace the rotor and stator from the side of the vessel.
  • the outer surface of the rotor and the inner surface of the stator are complementarily conical, and the rotor is urged from the outside of the vessel toward the stator.
  • the outer surface of the rotor and the inner surface of the stator are of a circular cylindrical shape. This provides a satisfactory seat between the rotor and the stator without the application of external forces. However, this arrangement yet provides the desired low construction cost and easy accessibility of the parts of the rotary valve, as well as easy and simple actuation of the rotor.
  • the rotor in addition to the rotor being rotatable about the horizontal axis, the rotor also can be moved axially within the stator. This makes it possible to achieve opening and closing or metering of the rotary valve selectively by rotating the rotor, by moving the rotor axially, or by means of both such motions.
  • control of the discharged stream preferably is achieved by rotation of the rotor, and opening of the rotary valve preferably is achieved by axially moving the rotor.
  • This arrangement can reduce wear of particular portions of the rotor to provide a longer service life therefor than if the rotor were to be moved only in rotation or only axially.
  • the entry port of the flow channel through the rotor also opens onto the outer surface thereof.
  • the flow channel of the rotor extends substantially perpendicularly of the axis of rotation, thereby providing for easy and simple manufacture of the rotor.
  • the flow channel of the rotor includes plural portions extending angularly to each other.
  • the inlet port of the flow channel of the rotor opens onto an end surface of the rotor that faces the interior of the vessel.
  • Such end surface preferably extends substantially transverse to the axis, such that the flow channel includes a horizontal section that leads to a vertical section.
  • the majority of the rotor, particularly that part including the horizontal section of the flow channel, is arranged above the upper side of the refractory lining of the vessel bottom, i.e. advantageously thermally close to the molten metal, while at the same time the molten metal can flow out of the interior vessel through the flow channel without substantially any restructions.
  • the end surface onto which the horizontal section of the flow channel opens is substantially vertical to the horiztonal axis of rotation, during control of the discharged pouring stream the position of the entry port of the flow channel does not change with respect to the position of the discharge port of the discharge channel of the stator, even during rotation of the rotor whereby the discharge port of the flow channel of the rotor is displaced.
  • both the stator and the rotor can be replaced through the vessel bottom wall and/or the vessel side wall so that when worn, both of these parts fitted together can be replaced together by a new stator-rotor unit.
  • the stator is arranged in a transition region between the lining of the vessel side wall and the lining of the vessel bottom wall, with a recess in the vessel bottom lining for vertical discharge of the molten metal and a recess in the vessel side wall lining for actuation of the rotor being as close together as possible.
  • This makes it possible for the rotor to be driven through the lining of the vessel side wall by relatively simple driving structure.
  • actuation of the rotor is achieved by a drive arrangement of relatively simple construction.
  • the rotor is held in the recess or seat of the stator by means of an actuating head that is connected to the rotor and that is rotated by a drive device. If the rotor is to be moved axially and rotated, then the actuating head forms a positive connection with the driven end of the rotor to serve as a drive member. If the rotor is to be rotated only, and not moved axially, then the actuating head can mate preferably only loosely with the rotor on the drive side thereof, so that the actuating head can be readily and simply withdrawn axially to ensure good accessibility to the rotor.
  • the rotor preferably may be connected to the drive by means of a universal joint.
  • the rotor can be connected to the drive by means of an elastic coupling to compensate for axial movement or displacement.
  • the drive and the drive transfer connection to the rotor can be supported or mounted on a support member that is pivotally mounted on the side wall of the vessel. When the support member is pivoted to an open position, the drive and drive transfer connection to the rotor move away from the rotor such that the rotor then easily is accessible for replacement. Since the rotor is subject to heavy wear, particularly when used for throttling the pouring stream, this quick and easy replacement when employing a lateral drive is an important advantage.
  • the stator is of a length such that opposite ends thereof can be extended through opposite side walls of the vessel, and the rotor is axially movable entirely through the complete length of the stator.
  • the inner surface of the stator and the outer surface of the rotor are cylindrical with a circular cross section and thus fit together forming a packing seat or seal.
  • the rotor thereby can be rotated within the stator and also can be axially moved through the stator. Rotation can be employed to open and close the flow channel of the rotor, and the axial movement can be employed for replacement of the rotor. Also however, the flow channel of the rotor also can be opened and closed by axial movement of the rotor within the stator.
  • the rotor can be moved to a required position from one lateral end of the stator that is located within or outside of the side wall of the vessel, and therefore that is readily accessible.
  • the flow channel of the rotor and the discharge channel of the stator can be moved into and out of alignment by rotation and/or by axial movement of the rotor.
  • the entire rotary valve structure is directly within the molten metal or directly adjacent thereto. As a result, the danger of freezing is very slight.
  • the stator is in the form of a cylindrical pipe. This has the advantage that the wall thickness of the stator will be circumferentially uniform, whereby the rotor will be subjected to uniform thermal conditions circumferentially of the valve. This results in minimum stress on the refractory parts of the rotary valve that are subject to wear and to further reduction of the risk of freezing. Normally the discharge channel and the flow channel extend in straight lines.
  • the discharge and flow channels each may include portions extending angularly of each other. This is of particular advantage when the rotary valve is arranged at a transition region between the vessel bottom and the vessel side.
  • the rotor may be in the form of plural rotor members connected together axially in end-to-end fashion within the stator recess, each rotor member having therethrough a respective flow channel.
  • the adjacent ends of the rotor members may be connected by respective tongue and groove connector arrangements forming a positive connection therebetween.
  • each rotor member can be relatively short and thus simple to manufacture, transport, mount and replace.
  • stator Due to the end-to-end connection, only that part of the rotor that is most external axially need be driven at one end of the stator adjacent the particular vessel side wall, and all of the other rotor members will be rotated together therewith. Further, the tongue and groove connection arrangements ensure that the rotor members are in the correct relative circumferential position with respect to each other. Also, the stator may be in the form of plural stator members connected together axially in end-to-end fashion, for example by means of respective tongue and groove arrangements that mutually stop the stator members.
  • a refractory immersion nozzle can extend from the stator, or at least a part thereof, the immersion nozzle having therethrough a duct aligned with the discharge channel of the stator.
  • the immersion nozzle may be formed integrally with the stator or stator part or may be an element formed separately thereof.
  • the rotor can be replaced very simply, it is possible to achieve a good seal between the rotor and the stator by providing that the rotor is made of a relatively soft refractory material that is subject to wear, and the stator may be made of a relatively hard, wear-resistant refractory material. It is possible in accordance with the present invention however to reverse this refractory material arrangement, particularly if the stator also can be replaced through the side wall of the vessel or through the bottom of the vessel.
  • the rotary valve of the present invention is substantially surrounded by the molten metal and therefore cannot be contacted by oxygen.
  • the refractory material of the rotor and/or the stator can, at least on the respective outer or inner surface thereof, contain a permanent lubricant such as carbon, graphite or similar material.
  • a sliding sleeve positioned between the outer surface of the rotor and the inner surface of the stator, such sleeve being formed of a material, for example refractory, that ensures permanent lubrication.
  • the refractory material of the rotor and/or the stator may contain ceramic fibers or ceramic fibers and fibers of carbon and graphite.
  • the rotor and/or stator may be formed of carbon or graphite.
  • the rotor and/or the stator may be formed of a refractory concrete, possibly containing carbon.
  • FIG. 1 is a partial vertical section through a rotary valve according to one embodiment of the present invention, the valve being shown installed in a lower portion of a metallurgical vessel;
  • FIG. 1a is an enlarged view, partially in section, of the area of driving connection of a rotor shown in FIG. 1, but turned 90° with respect to the position shown in FIG. 1;
  • FIGS. 2 through 6 are views similar to FIG. 1 but of different embodiments of the present invention.
  • FIG. 7a is a vertical section of still another embodiment of a rotary valve according to the present invention.
  • FIG. 7b is a section taken along line VIIb--VIIb of FIG. 7a;
  • FIG. 8 is a transverse section through a modification of the embodiment of FIGS. 7a and 7b;
  • FIG. 9a is an elevation view of a stator employed in the embodiments of FIGS. 7a--8, but also indicating a possible modification thereof;
  • FIG. 9b is a perspective view of a rotor employable in the embodiments of FIGS. 7a--8, but also illustrating a modification thereof;
  • FIG. 10 is a transverse section, shown somewhat schematically, through a metallurgical vessel equipped with a rotary valve in accordance with the embodiments of FIGS. 7a-7b.
  • FIG. 1 shows an embodiment of a rotary valve 1 of the present invention positioned in the region of molten metal within an interior 8 of a metallurgical vessel including a vessel bottom wall 33 having a refractory lining 2 and a vessel side wall 34 having a refractory linine 3.
  • the refractory linings 2, 3 protect the bottom wall 33 and the side wall 34, respectively.
  • the rotary valve 1 is positioned within the refractory linings in the area of juncture between linings 2, 3.
  • Vessel bottom 33 has a recess for downward discharge therethrough of molten metal through the rotary valve, and side wall 34 has a recess for lateral access to and driving connection to rotary valve 1.
  • the rotary valve 1 replaces respective portions of linings 2, 3.
  • Rotary valve 1 includes a rotor 4 having a conical peripheral outer surface and serving as a valve member that is pressed into a recess defined by a conical inner seat or surface 17 of a stator 6.
  • Surface 17 is complementary to the outer conical surface of rotor 4, and both such surfaces are symmetrical around a substantially horizontal axis of rotation A.
  • Stator 6 is in the form of two parts, one of which has therethrough a substantially vertical discharge channel 5 and having a downward extension in the form of an integral discharge pipe 10 extending through refractory lining 2 and bottom wall 33 and defining, for example, an immersion nozzle.
  • Surface 17 is defined within this part of the stator.
  • FIG. 1 shows an open position of the rotary valve.
  • Flow channel 7 has an entry port 14 and a discharge port 15 both opening onto the outer conical surface of rotor 4.
  • Discharge channel 5 includes an inlet port 16 and a discharge port 13 spaced vertically so that when rotor 4 is in the open position shown in FIG. 1, the discharge stream of molten metal will be substantially straight and vertically downwardly.
  • an actuating head or member 18 engages the rotor 4 to impart rotation thereto around horizontal axis A.
  • Member 18 has a strip-like tongue or extension 23 fitting into a recess in the form of a diametral cross slot or groove 24 in rotor 4. This connection enables transfer of torque to the rotor 4.
  • Member 18 has an annular flange 25 extending over the drive-side end of rotor 4.
  • a drive shaft 11 of a drive unit, for example a motor, 20 is attached to member 18 by means of a universal joint 19.
  • Drive shaft 11 further includes an elastic coupling 21 between the thrust bearing and drive motor 20.
  • the drive attachment structure is capable of taking up axial movement, for example as might result from thermal expansion.
  • Drive shaft 11, spring unit 12, member 18, universal joint 19, elastic coupling 21, and drive motor 20 all are supported in a supporting member 22 that can be pivoted downwardly from the position shown in FIG. 1 around a pivot joint 26 mounted on the exterior of the metallurgical vessel. This is achieved after a quick connection 27 has been disconnected.
  • stator 6 Upon such pivoting downwardly of supporting member 22, the above elements are pivoted away from the opening into the rotary valve. In this manner, rotor 4 is easily accessible for removal and replacement. After swinging away of supporting member 22, part 6' of the stator also may be removed laterally from lining 3, 2. Upon removal of rotor 4, then the remaining part of stator 6 can be pulled out, i.e. upwardly through interior 8.
  • stator 6 and integral discharge pipe 10 are inserted downwardly from interior 8 of the vessel through the lining 2, and lateral part 6' of the stator is inserted laterally through side wall lining 3
  • stator 6a comprises a unitary block which can be inserted in its entirety through side wall 34 and lining 3.
  • a discharge pipe 10a which can be constructed in two parts, for example parts 10' and 10", is mounted in alignment with discharge port 13 of discharge channel 5 of stator 6a from below through a recess in bottom wall 33 and lining 2.
  • Discharge pipe 10a is held in such position by means of a clamping device 28.
  • stator 6a is sealed by injecting a sealing compound via a connecting line 30 into a free space 31 surrounding joint 29.
  • An upper conical end of discharge pipe 10a extends into such space.
  • stator 6a is slightly wedge-shaped in order to facilitate replacement through side wall 34.
  • the embodiment of FIG. 2 is like the embodiment of FIG. 1.
  • FIG. 3 The embodiment of a rotary valve 1b shown in FIG. 3 is distinguished from the embodiment of FIG. 2 in that flow channel 7b of rotor 4b does not extend entirely rectilinearly, but rather such that only outlet port 15 opens onto the outer conical surface of the rotor, whereby the flow channel has a portion extending laterally and opening onto an end surface of the rotor that faces the interior of the metallurgical vessel.
  • inlet port 14b of flow channel 7 is on the side of the molten metal.
  • the discharge channel 5 of stator 6b has only an outlet port 13, the inlet port essentially being an open end of the stator.
  • a sliding or wear sleeve 9 is shown inserted between the conical outer surface of the rotor and the conical inner surface 17 of the stator.
  • Sleeve 9 may perform a lubricating function to facilitate rotation of the rotor.
  • the outer end of stator 6b has an external flange 32 abutting the outside of side wall 34 and on which, in the closed position of supporting member 22, supporting member 22 acts to secure stator 6b in a quick and efficient manner. It will be apparent that the general position of the valve 1b of the embodiment of FIG. 3 is raised relative to the position of the valve 1a of FIG. 2 to enable the inlet port 14b to be above lining 2.
  • rotor 4c has an inner end of spherical shape mating with an inner surface 17c of stator 6c of complementary shape and defining a stator recess.
  • Flow channel 7c of rotor 4c has portions bent slightly at an angle to each other so that discharge port 15c of channel 7c and discharge port 13c of discharge channel 5c extend generally downwardly, but inlet port 14c of channel 7c aligns with inlet port 16c of channel 5c that extends in a generally laterally inward direction.
  • the stator 6c is of one piece construction and has abutted at the bottom thereof a discharge pipe 10c. Other features of this embodiment are similar to features discussed regarding previous embodiments.
  • the complementary surfaces of the stator and rotor are conical, and the rotor is urged inwardly toward the stator to achieve a suitable seal therebetween.
  • the outer peripheral surface 45 of rotor 4d is cylindrical with a circular transverse cross section, and the inner peripheral surface 17d of a recess formed in stator 6d is complementarily cylindrically shaped.
  • bottom wall 33 has therein an opening 50 to enable passage therethrough of stator 6d and rotor 4d together.
  • side wall 34 has therein an opening 55 of a size to receive therethrough a hollow generally cylindrical holder member 62 formed of refractory material and abutting stator 6d.
  • Holder 62 receives the drive attachment structure.
  • rotor 4d is not only PG,19 rotatable within stator 6d, but also is movable back and forth axially therein.
  • projection 23 forms a positive connection with the rotor.
  • member 18 has a shoulder 37 abutting on an outer end of stator 6d.
  • the laterally positioned drive mechanism may include a corresponding linear drive.
  • the drive shaft 11 can be designed as a thrust piston motor.
  • the embodiment of FIG. 6 basically is a combination of the features of FIGS. 3 and 5.
  • the embodiment of FIG. 6 is the same as the embodiment of FIG. 5, except the flow channel 7e of rotor 4e includes an inlet port 14e that opens onto an inner end surface 39 of the rotor and is in direct communication with the interior 8 of the vessel.
  • the other features of the embodiment of FIG. 6 all have been described above with regard to the embodiments of FIGS. 3 and 5.
  • stator-rotor unit is fully integrated into the vessel bottom and side wall linings 2, 3, obviously such unit also can be positioned further into the interior 8 of the vessel.
  • such movement first would be to the left, and then if necessary upwardly.
  • the rotary valve would be surrounded on substantially all sides thereof by the molten metal to thereby further prevent freezing and entry of oxygen.
  • the rotary valve of includes a stator 6f that has a length sufficient such that opposite ends thereof can be extended through opposed side walls of the metallurgical vessel.
  • a stator 6f that has a length sufficient such that opposite ends thereof can be extended through opposed side walls of the metallurgical vessel.
  • FIG. 10 This valve includes a rotor 4f which is rotatable about a horizontal axis A and which also is movable axially within a recess defined by a cylindrical inner surface 17f of the stator.
  • the outer configuration of the stator is substantially square.
  • an additionally advantageous arrangement is provided when the stator is in the shape of a tubular pipe the wall thickness of which is constant. This provides for uniform heat passing through the stator to the rotor, thereby providing uniform thermal expansion characteristics.
  • Rotor 4f has a flow channel 7f which can be brought more or less into alignment with a discharge channel 5f of stator 6f by moving the rotor into the stator axially and by rotating the rotor around axis A.
  • discharge channel 5f and flow channel 7f are positioned relatively close to one vessel side wall 3, 34.
  • such channels also can be arranged in the center of the vessel above bottom 2, 33.
  • Rotary valve 1f is arranged within vessel interior 8 on top of lining 2 and in operation is surrounded on three sides by the molten metal. However, the valve can be at least partially embedded in lining 2.
  • Discharge port 13f terminates in communication with a discharge pipe 10f embedded in lining 2.
  • Rotor 4f can be driven in a simple manner from the exterior of the vessel by a drive arrangement 59 illustrated schematically in FIG. 10.
  • rotor 4f can project outwardly of stator 6f to a necessary extent.
  • a valve arrangement 60 also shown in FIG. 10 and designed, for example as a flap, is provided at the end of the stator opposite drive arrangement 59.
  • the rotary valve of this embodiment has the advantage that when it becomes worn out, rotor 4f readily can be replaced by being pushed axially entirely through the stator, and also when the stator has to be replaced it can be pushed axially through the vessel.
  • stator 6g is arranged in the area of juncture between bottom lining 2 and side wall lining 3.
  • discharge channel 5g of stator 6g and flow channel 7g of rotor 4g each include portions bent at an angle relative to each other such that the molten metal during discharge first is guided at an inclination downwardly and then vertically downwardly.
  • inlet port 16g of channel 5g is broadened inwardly.
  • FIGS. 9a, 9b and 10 illustrate a further feature of the present invention wherein the stator and/or rotor may be formed of plural members.
  • rotor 4h can be formed of a plurality of rotor members 4h'
  • stator 6h can be formed of a plurality of separate stator members 6h'.
  • the rotor and stator members therefore readily can be replaced with new members by being pushed axially from one side. This even can be performed during a pouring operation.
  • Adjacent ends of the rotor members 4h' are connected together in end-to-end fashion, for example by tongue and groove connection arrangements.
  • Each rotor member 4h' has a respective flow channel 7h that can be brought into alignment with one discharge channel 5h formed in the stator or in one stator member. In the arrangement illustrated in FIG. 9a, only one of the stator members 6h' is provided with a discharge channel 5h.
  • the present invention is not however limited to such a specific arrangement.
  • FIG. 10 shows an arrangement whereby a rotary valve includes a rotor 4i formed of a plurality of rotor members 4i' connected in end-to-end fashion and each having a flow channel 7i.
  • Axial movement of all of the rotor members through a stator 6i successively brings flow channels 7i of the various rotor members 4i' into alignment with a discharge channel 5i of stator 6i.
  • the stator also can be formed of plural end-to-end connected stator parts in the manner shown in FIG. 9a. Movement of the rotor axially is possible even when the vessel is filled with molten metal, and such movement can be initiated by driver 59 with valve arrangement 60 pivoted to an open position.
  • one of the rotor or the stator may be made of a relatively soft refractory material that is subject to wear, and the other of the stator or rotor may be made of a relatively hard, wear-resistant refractory material. This will facilitate a good seal or seat between the rotor and stator.
  • at least one of the rotor or the stator, at least on the respective outer or inner surface thereof, may contain a permanent lubricant such as carbon, graphite or similar material.
  • the refractory material of at least one of the rotor or the stator may contain ceramic fibers or ceramic fibers and fibers of carbon or graphite.
  • the rotor or the stator may be formed of graphite or carbon.
  • at least one of the rotor or the stator may be made of a refractory concrete, preferably containing carbon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Sliding Valves (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
US07/227,880 1987-08-03 1988-08-03 Rotary valve for a metallurgical vessel and rotor and stator therefor Expired - Fee Related US4913324A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19873725637 DE3725637A1 (de) 1987-08-03 1987-08-03 Drehverschluss fuer ein metallurgisches gefaess sowie rotor bzw. stator fuer einen solchen drehverschluss
DE3725637 1987-08-03
DE19883805070 DE3805070A1 (de) 1987-08-03 1988-02-18 Drehverschluss fuer ein metallurgisches gefaess sowie rotor bzw. stator fuer einen solchen drehverschluss
DE3805070 1988-02-18
DE19883819784 DE3819784A1 (de) 1987-08-03 1988-06-10 Drehverschluss fuer ein metallurgisches gefaess sowie rotor bzw. stator fuer einen solchen drehverschluss
DE3819784 1988-06-10

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US07/248,550 Continuation-In-Part US4949886A (en) 1987-09-19 1988-09-19 Horizontal or vertical rotary valve for a metallurgical vessel
US07/454,502 Division US5083688A (en) 1987-08-03 1989-12-21 Rotary valve for a metallurgical vessel and rotor and stator therefor

Publications (1)

Publication Number Publication Date
US4913324A true US4913324A (en) 1990-04-03

Family

ID=27196301

Family Applications (2)

Application Number Title Priority Date Filing Date
US07/227,880 Expired - Fee Related US4913324A (en) 1987-08-03 1988-08-03 Rotary valve for a metallurgical vessel and rotor and stator therefor
US07/454,502 Expired - Fee Related US5083688A (en) 1987-08-03 1989-12-21 Rotary valve for a metallurgical vessel and rotor and stator therefor

Family Applications After (1)

Application Number Title Priority Date Filing Date
US07/454,502 Expired - Fee Related US5083688A (en) 1987-08-03 1989-12-21 Rotary valve for a metallurgical vessel and rotor and stator therefor

Country Status (12)

Country Link
US (2) US4913324A (de)
EP (1) EP0302215B1 (de)
JP (1) JPS6457971A (de)
KR (1) KR890003473A (de)
CN (1) CN1014687B (de)
AT (1) ATE83957T1 (de)
BR (1) BR8803805A (de)
CA (1) CA1339523C (de)
DE (1) DE3877081D1 (de)
ES (1) ES2037766T3 (de)
GR (1) GR3006885T3 (de)
SU (1) SU1732809A3 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054665A (en) * 1990-01-11 1991-10-08 Didier-Werke Ag Elongated nozzle assembly including stator and rotor members with elongated slots
US5078306A (en) * 1988-09-29 1992-01-07 Stopinc Ag Refractory valve unit for controlling the discharge of molten metal in a metallurgical vessel
US5121860A (en) * 1988-02-18 1992-06-16 Didier-Werke Ag Shut-off and control valve for use in continuous casting of a thin strip or slab
US5156752A (en) * 1990-01-11 1992-10-20 Didier-Werke Ag Elongated stator and rotor members with elongated slots
AU651946B2 (en) * 1989-06-01 1994-08-11 Shinagawa Refractories Co., Ltd. Apparatus for controlling flow rate of molten metal
WO2005102563A2 (en) * 2004-04-27 2005-11-03 Indref Oy Closure of the discharge channel of a metal casting vessel
WO2005102562A2 (en) * 2004-04-27 2005-11-03 Indref Oy Apparatus, arrangement and method for attaching a nozzle or cock to the bottom hole of a metal casting vessel
US20160298907A1 (en) * 2013-04-12 2016-10-13 Refrectory Intellectual Property GmbH & Co. KG Method for determining the state of the tap of a metallurgical vessel in particular
US10935320B2 (en) 2013-04-12 2021-03-02 Refractory Intellectual Property Gmbh & Co. Kg Method for determining the state of a refractory lining of a metallurgical vessel for molten metal in particular

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014907A1 (en) * 1988-01-13 1990-12-13 Shinagawa Refractories Co., Ltd. Apparatus for controlling flow rate of molten metal
DE3826245A1 (de) * 1988-08-02 1990-02-08 Didier Werke Ag Schliess- und/oder regelorgan fuer den abstich fluessiger metallschmelze aus einem metallurgischen gefaess
BR9205455A (pt) * 1991-01-18 1993-11-23 Foseco Int Salda para recipiente que contem um corpo solido em estado de fusao,recipiente e processo para soltar o que esta em estado de fusao de um recipiente de uma maneira controlada
WO2000056484A1 (en) * 1999-03-22 2000-09-28 Vesuvius Crucible Company Refractory member and rotary valve for molten metal
US7543605B1 (en) * 2008-06-03 2009-06-09 Morando Jorge A Dual recycling/transfer furnace flow management valve for low melting temperature metals
RU2484923C1 (ru) * 2012-03-11 2013-06-20 Научно-производственное республиканское унитарное предприятие "НПО "Центр" Литейный ковш
JP6565939B2 (ja) 2017-01-12 2019-08-28 トヨタ自動車株式会社 車両用パネル構造

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US1742065A (en) * 1928-05-26 1929-12-31 George H J Eiser Ladle discharger
US2224514A (en) * 1939-04-28 1940-12-10 United American Metals Corp Melting pot
US3344965A (en) * 1965-10-18 1967-10-03 Joseph J Kerin Pouring nozzle for molten steel ladle
GB1177262A (en) * 1966-04-20 1970-01-07 John Nadrich Bottom Pour Metallurgical Ladle
US3651998A (en) * 1970-09-23 1972-03-28 Metallurg Exoproducts Corp Nozzle for a pouring ladle
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AT357283B (de) * 1977-09-16 1980-06-25 Voest Alpine Ag Drehschieberverschluss fuer mit feuerfester auskleidung versehene gefaesse
DE3306670A1 (de) * 1983-02-25 1984-09-06 Gerhard 6920 Sinsheim Bleickert Abstichvorrichtung fuer abschmelz- und/oder warmhalteoefen fuer ne-metalle bzw. ne-metallschmelzen
DE3342836A1 (de) * 1983-01-11 1985-01-24 Stopinc Ag, Baar Drehverschluss fuer schmelzfluessige werkstoffe, insbesondere metall-schmelzen
JPS61182857A (ja) * 1985-02-08 1986-08-15 Shinagawa Refract Co Ltd 連続鋳造用タンデイツシユ流量制御装置
GB2174029A (en) * 1985-03-26 1986-10-29 British Steel Corp Improvements in or relating to outlet valves for melt-containing vessels
DE3540202C1 (de) * 1985-11-13 1986-11-27 Brown, Boveri & Cie Ag, 6800 Mannheim Zuflußstellglied für eine Kokillenfüllstandsregelung einer Stranggießanlage

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US2087824A (en) * 1934-06-21 1937-07-20 Robert J Tully Metal teeming apparatus
US3165795A (en) * 1963-05-08 1965-01-19 George C Bahm Apparatus for teeming of molten metals
GB1243778A (en) * 1967-09-08 1971-08-25 Ashmore Benson Pease & Company Continuous casting apparatus
US4630667A (en) * 1985-07-17 1986-12-23 Labate Michael D Coated refractory shapes useful in bottom pouring of ingots in ingot molds
GB8701158D0 (en) * 1987-01-20 1987-02-25 Distington Eng Contracting Ltd Vessels

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT165292B (de) *
GB183241A (en) * 1921-04-19 1922-07-19 William Rowlands Improvements in or relating to teeming devices for ladles adapted to hold molten steel
US1742065A (en) * 1928-05-26 1929-12-31 George H J Eiser Ladle discharger
US2224514A (en) * 1939-04-28 1940-12-10 United American Metals Corp Melting pot
US3344965A (en) * 1965-10-18 1967-10-03 Joseph J Kerin Pouring nozzle for molten steel ladle
GB1177262A (en) * 1966-04-20 1970-01-07 John Nadrich Bottom Pour Metallurgical Ladle
US3651998A (en) * 1970-09-23 1972-03-28 Metallurg Exoproducts Corp Nozzle for a pouring ladle
CH571374A5 (de) * 1974-07-12 1976-01-15 Metacon Ag
DE2608472A1 (de) * 1976-02-27 1977-09-08 Mannesmann Ag Drehschieberverschluss fuer giesspfannen
AT357283B (de) * 1977-09-16 1980-06-25 Voest Alpine Ag Drehschieberverschluss fuer mit feuerfester auskleidung versehene gefaesse
DE3342836A1 (de) * 1983-01-11 1985-01-24 Stopinc Ag, Baar Drehverschluss fuer schmelzfluessige werkstoffe, insbesondere metall-schmelzen
DE3306670A1 (de) * 1983-02-25 1984-09-06 Gerhard 6920 Sinsheim Bleickert Abstichvorrichtung fuer abschmelz- und/oder warmhalteoefen fuer ne-metalle bzw. ne-metallschmelzen
JPS61182857A (ja) * 1985-02-08 1986-08-15 Shinagawa Refract Co Ltd 連続鋳造用タンデイツシユ流量制御装置
GB2174029A (en) * 1985-03-26 1986-10-29 British Steel Corp Improvements in or relating to outlet valves for melt-containing vessels
DE3540202C1 (de) * 1985-11-13 1986-11-27 Brown, Boveri & Cie Ag, 6800 Mannheim Zuflußstellglied für eine Kokillenfüllstandsregelung einer Stranggießanlage

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121860A (en) * 1988-02-18 1992-06-16 Didier-Werke Ag Shut-off and control valve for use in continuous casting of a thin strip or slab
US5127557A (en) * 1988-02-18 1992-07-07 Didier-Werke Ag Shut-off and control valve for use in continuous casting of a thin strip or slab
US5078306A (en) * 1988-09-29 1992-01-07 Stopinc Ag Refractory valve unit for controlling the discharge of molten metal in a metallurgical vessel
AU651946B2 (en) * 1989-06-01 1994-08-11 Shinagawa Refractories Co., Ltd. Apparatus for controlling flow rate of molten metal
US5054665A (en) * 1990-01-11 1991-10-08 Didier-Werke Ag Elongated nozzle assembly including stator and rotor members with elongated slots
US5156752A (en) * 1990-01-11 1992-10-20 Didier-Werke Ag Elongated stator and rotor members with elongated slots
WO2005102563A2 (en) * 2004-04-27 2005-11-03 Indref Oy Closure of the discharge channel of a metal casting vessel
WO2005102562A2 (en) * 2004-04-27 2005-11-03 Indref Oy Apparatus, arrangement and method for attaching a nozzle or cock to the bottom hole of a metal casting vessel
WO2005102563A3 (en) * 2004-04-27 2006-02-02 Indref Oy Closure of the discharge channel of a metal casting vessel
WO2005102562A3 (en) * 2004-04-27 2006-02-09 Indref Oy Apparatus, arrangement and method for attaching a nozzle or cock to the bottom hole of a metal casting vessel
US20160298907A1 (en) * 2013-04-12 2016-10-13 Refrectory Intellectual Property GmbH & Co. KG Method for determining the state of the tap of a metallurgical vessel in particular
US10935320B2 (en) 2013-04-12 2021-03-02 Refractory Intellectual Property Gmbh & Co. Kg Method for determining the state of a refractory lining of a metallurgical vessel for molten metal in particular

Also Published As

Publication number Publication date
BR8803805A (pt) 1989-02-21
CN1014687B (zh) 1991-11-13
ATE83957T1 (de) 1993-01-15
GR3006885T3 (de) 1993-06-30
DE3877081D1 (de) 1993-02-11
CA1339523C (en) 1997-11-04
ES2037766T3 (es) 1993-07-01
KR890003473A (ko) 1989-04-15
JPS6457971A (en) 1989-03-06
CN1031341A (zh) 1989-03-01
EP0302215A1 (de) 1989-02-08
SU1732809A3 (ru) 1992-05-07
EP0302215B1 (de) 1992-12-30
US5083688A (en) 1992-01-28

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